Hey, your little control in the housekeeper appear on time, today to bring us the pneumatic - valve jargon, understand these simple terms, believe that we will be more convenient in the future the use of the regulator,

Strength
The strength of the pneumatic control valve performance is the ability to under medium pressure valve, the valve is under pressure of mechanical products, and therefore must have sufficient strength and rigidity, so as to ensure the long-term use without cracking or deformation,

The sealing performance
Pneumatic control valve sealing performance refers to the sealing parts of valve's ability to prevent leakage of medium, it is the most important technical performance index of the valve, the valve sealing parts of the three: open-close part and seat the contact point between the two sealing surface; Packing match and with the stem and packing gland; Body and bonnet joint, which the former one is called the internal leakage of leakage, known as the closed lax, it will affect the valve block the ability of media, for block valve type, the internal leakage is not allowed, after the two called the leakage of leakage, the medium from leaking to the outside of the valve in the valve, leakage would cause material damage, environmental pollution, serious when still can cause accidents, for flammable and explosive, toxic or radioactive medium, leakage is not allowed, so the valve must have a reliable sealing performance,

The flow medium
Causes medium flow through the valve after pressure loss (both before and after the valve pressure difference), namely the valve has a certain resistance to the flow of medium, medium to overcome the resistance of the valve will consume a certain amount of energy, from the consideration on the energy saving, design and manufacture of valves, as far as possible to reduce the valve for liquid medium resistance,

Open/close force and open-close moment
Open/close force and refers to open or close the valve opening and closing torque must be imposed by force or moment, close the valve, the need to make the open-close part and send a form a seal between the two sealing surface pressure, but also overcome between stem and packing, the valve stem and threads of the nut, valve rod end bearing friction and other parts of the friction force, and therefore must exert closing force and close moment, in the process of opening and closing, the valve is required for opening and closing force and the open-close torque changes, its maximum is in the closed end transient or open the initial transient, design and manufacture of the valve to reduce the closing force and close moment,

Action sensitivity and reliability of
This refers to the valve for medium parameters change, accordingly the sensitive degree of reaction, the throttle valve, relief valve, regulating valve used for adjusting the parameters of the medium, such as valve and relief valve, steam trap with specific functions such as valves, its function and reliability sensitivity is an important technical performance indicators,